Method of making cores.



No. 799,846. PATBNTBD SEPT. 19, 1905.

J. F. HAY. METHOD OF MAKING coaas.

APPLICATION FILED OCT. 17,1904.

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b I J? 4 6' D va mm fi glzlc'ynfoz .7. W w/ m Q Grimm-a opening a unrrnn STATES JOHN F. HAY, OF ERIE, PENNSYLVANIA. ASSIGNOR TO ERIE MALLEABLE PATENT orrron.

METHOD OF MAKING CORES.

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed October 1'7, 1904. Serial No. 228,894.

1'0 all lull/0711, it may concern.-

Be it known that 1, JOHN F. HAY, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in the Method or Process of Forming Cores, of which the following is a specification.

This invention relates to improvements in the method or process of forming cores; and it consists in certain improvements therein. as will be hereinafter fully described, and pointed out in the claims.

In the casting of iron and other metals, and especially iron from which malleable iron is produced, certain shapes produce stress and defects in the metal, which occasion many losses in the manufacture and prevent the assurance of solidity, which is very desirable in such articles. This is especially true of malleable-iron fittings, such as Ts and elbows, wherein such stress or defect is liable to occur at the angle, the metal at this point often being porous or weak, so as to destroy its usefulness. By placinga chill at this angleor point of stress it has been found that this difiiculty is largely if not wholly overcome. Certain-shaped chills are more desirable than others.

This invention relates to the method of forming cores with chills arranged at the desired points.

The means of carrying out the process and the core is illustrated in the accompanying drawings as follows: Figure 1 shows an elevation of half of a core-box; Fig. 2, the opposite half of the core-box; Fig. 3, a plan view of a core formed in accordance with my invention; Fig. 4:, a section on the line 4 t in Fig. 2.

The core-box shown is designed to form a core for a T, the main passage being formed at a and the cross-passage at a. The parts are adapted to be brought into register in the usual manner with the dowel-pins a which are adapted to enter the opening a to lock the parts in register. The angles A of the box are preferably formed of considerble thickness and have extending through them the opening a A chill B, preferably pointed, is adapted to be inserted through the A follower O is also adapted to be inserted in the opening (L The follower is provided with a stop 0, which is arranged to bring the inner end of the follower flush with the inner surface of the box.

In carrying out my process the core is formed in the usual manner in the core-box, although not necessarily rammed to the full extent, and the chills B are placed in the opening a and forced into the material forming the core while it is in a plastic condition and confined by the box. It will be noted that this forcing of the chill B into position forces an opening in the material forming the core, which is adapted to hold the chill. The parts O and B may be made integral if desired and the opening formed and the chill inserted subsequently. In carrying out the preferred method, however, the opening for the chill is not only formed by the insertion of the part B, but the part B also forms the chill. By forcing the chill directly into the material a firmer grip on the chill is made possible.

I prefer that the longer dimension of the chill extend inwardly from the angle. In this manner a comparatively small exposed surface of the chill may be made efiective by reason of the mass of material behind the surface. I have also found that a round surface seems to efiect a more uniform and desirable arrangement of fiber at the angle than any other shape, and in my preferred construction of core the chill is provided with a round face. By this method the cores may be formed nearly as cheaply as the ordinary core, and the chill is firmly secured at just the proper point to prevent the stress or defects at theangle.

What I claim as new is 1. The method or process of forming cores which consists in shaping and confining the core material and forming a chill-opening in the material by displacing the material for the opening by force applied to the material while so confined.

2. The method or process of forming cores for articles having angles which consists in shaping and confining the core material, and forming a chill-opening in the material at the angle by displacing the material for the opening at the angle by force applied to the material while so confined.

.3. The method or process of forming cores for pipe-fittings having angles which consists in shaping and confining the core material and forming a chill-opening in the material at the angle by displacing the material for the opening at the angle by force applied to the material While so confined.

4. The method or process of forming cores which consists in shaping and confining the core material and forcing a chill into the material While so confined.

5. The method or process of forming cores for articles having angles which consists in shaping and confining the core material and forcing a chill into the material While so confined and at the angle.

6. The method or process of forming cores for pipe-fittings having angles which consists in shaping and confining the core material and forcing a chill into the material While so confined and at the angle.

In testimony whereof I have hereunto set my hand in the presence of two subscribing 20 Witnesses.

JOHN F. HAY.

Witnesses:

C. D. HIGBY, B. J. WALKER. 

